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ICRH beatwave excited toroidicity induced Alfvén eigenmodes in ASDEX Upgrade

K. Sassenberg, M. Maraschek, P.J. Mc Carthy, W. Bobkov, M. García-Muñoz, N. Hicks, V. Igochine, P. Lauber, S. Günter, ASDEX Upgrade Team2010年被引用 6Nuclear FusionIF 3出版社

Experimental evidence is presented demonstrating that an ion cyclotron resonance heating (ICRH) beatwave can drive toroidicity induced Alfvén eigenmodes (TAEs) to a finite amplitude and also increase the amplitude of TAEs already excited by fast ions. The radial structure of a beatwave driven TAE reconstructed from soft x-ray measurements is shown to agree with simulations from the gyro-kinetic code LIGKA. Thus beatwaves provide the means to excite TAEs which can be used to diagnose the plasma's safety factor profile through MHD-spectroscopic techniques without significantly perturbing the plasma or to influence the stability of existing TAEs allowing their effect on the fast ion population to be studied.

日本語訳

イオンサイクロトロン共鳴加熱(ICRH)ビート波が、トロイダル性誘起アルフヴェン固有モード(TAEs)を有限振幅まで駆動し得ること、また高速イオンによって既に励起されたTAEsの振幅を増大させ得ることを示す実験的証拠が提示される。軟X線計測から再構成されたビート波駆動TAEの動径構造は、ジャイロ運動論コードLIGKAによるシミュレーションと一致することが示される。したがって、ビート波は、プラズマを大きく擾乱することなくMHD分光法によってプラズマの安全係数分布を診断するために使用できるTAEsを励起する手段、あるいは既存のTAEsの安定性に影響を与えて高速イオン集団へのそれらの影響を研究することを可能にする手段を提供する。

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asdex-upgrade高精度(タイトル一致)

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ASDEXAlfvén waveASDEX UpgradeIon cyclotron heatingAlfvén eigenmode
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